Pump



H. R. HOLTy Juiy 20, 1965 PUMP 2 Sheets-Sheet 1 Filed Oct. l2, 1962 l. l.. l. L

ng. f v rev July 20, 1965 H. R. HOI-.T

PUMP

2 Sheets-Sheet 2A Filed Oct. 12, 1962 m w m/ W5 wwf@ DAC@ M yw v/K pw Hw NW United States Patent O 3,195,308 PUMP HarieyR. Holt, River Forest, Ill., assigner to Ray-Wayland Corporation, Chicago, Ill., a corporation of Iliinois Filed Oct. 12, 1962, Ser. No. 230,207

`Ciairns (Cl. 23o-160) This invention relates to pumps and has particular relation to air and vacuum pumps.

One purpose of the invention is to provide an air pressure pump of maximum simplicity in construction.

Another purpose of the invention is to provide an air pressure pump of maximum economy in manufacture.

Another purpose is to provide an air pressure pumping assembly whereby a plurality of pump elements are operated by a single means.

Another purpose is to provide a pump which, by minor modication, may be converted from an air pressure pump into a vacuum pump.

Another purpose is to provide an air pressure pump of minimum weight.

Another purpose is to provide an air pump-vacuum pump of maximum quietness in operation.

Another purpose is to provide a vacuum pump of minimum weight.

Another purpose is to provide an air pressure pump which may, by minor modification, be converted to a vacuum pump.

Other purposes Will appear from time to time during kthe course of the specification and claims.

' I illustrate my invention more or less diagrammatically in the accompanying drawings, wherein:

FIGURE l is an assembly View in perspective;

FIGURE 2 is a side elevation, on an enlarged scale, with parts broken away, and illustrating the pump of the invention employed as a pressure pump;

FIGURE 3 is a View similar to that of FIGURE 2 and illustrating the pump of the invention employed as a vacuum pump;

FIGURE 4 is a view taken on the line 4-4 of FIGURE 3;

FIGURE 5 is a detail view illustrating a valve plate element of the invention; and

n FIGURE 6 is a detail View of a portion of the invention.

Like parts are indicated by like numerals throughout theA specification and claims.

Referring now to the drawings, the numeral 1 indicates a cap member. The cap member 1 has a circular central portion 2 and a pair of diametrically, oppositely extending arms indicated by the numerals 3, 4. Upstanding from the top surface 5 of the member 1 is a pair of diametrically, oppositely positioned air outlet cones indicated by the numerals 6, 7. Passages 6a, 7a extend, respectively, through the cones 6, 7 and the member 1. Passages 8, 9 are positioned 90 degrees from passages 6a, 7a and extend through the portion 2 of' cover 1. Adjacent the outer ends of arms 3, 4, apertures 10, 11 are formed, respectively.

An annular downwardly depending flange surface 12 is formed on the under surface of circular portion 2 of cover 1. A flexible bellows 13 has an upwardly extending annular flange 14 surrounding one of its open ends for seating within the flange 12 of cover 1.

A valve plate 15 has an upwardly extending annular flange 16 for reception within a groove 16a in cover 1 and an annular perimeter surface 1617 which clamps the bellows flange 14 of bellows 13 against cover 1. The circular valve plate 15 has a pair of inlet passages 17, 18 diametrically oppositely positioned therein. The passages 17, 18 extend through uprising tubular segments 17a,

ice

rectilinear conguration and is composed of lexiblev material secured to the under surface 15a of plate 15 only at the central portion of element 19, as indicated at 2t). The outwardly extending portions of element 19 overlie the passages 17, 13 for purposes which will appear hereinbelow.

Positioned at 90 degrees from the passages 17, 18 in Valve plate 15 and in alignment with passages 6a, 7a of cover 1, are passages 21, 22. A second iapper valve element 23 is secured to the upper surface 15b of valvek plate 15. The member 23 is substantially identical'to element 19 and is secured to upper Surface 15b of valve plate 15 only adjacent the center of element 23. The outer ends of element 23 overlie the passages 21, 22.

A fastener element 24 secures valve plate 15 to the underside of cover 1.

An attaching or clamping plate -is substantially circular in over-all configuration and carries the outwardly extending annular flange 31 for clamping flange or enlargement 14a surrounding the opposite open end of bellows 13. The member 30 has a threaded extension or bolt portion 32 extending downwardly from substantially the center thereof through an aperture 33 formed in a bottom closure plate 34. The closure plate 34'has an upwardly extending annular perimeter flange portion 35 for reception therewithin of the iiange portion 14a surrounding the bottom opening of bollows'13.

A piston or sleeve member 4@ is held against the under surface of member 34 at the center thereof by a cap member 41. The cap member 41 has a substantially Hat outer end surface 42 and an annular flange 43 which receives that end of sleeve opposite from that which is in contact with plate 34. A central extension 44 of c'ap member 41 extends upwardly through sleeve 4t) and threadably engages the bolt 32. The member 41 may conveniently be formed of a suitable plastic material.

A bearing member 5@ has a pair of diametrically opposed, outwardly extending arm portions 51, 52 each having threaded sockets 53 formed respectively therein and upwardly open from the outer ends thereof for reception of fastener elements 55, 56, respectively, which fastener elements extend from a point above the cover 1, through the apertures 10, 11 into the sockets 53. For

accurate positioning, the fasteners 55, 56 may compress sleeves 57, 58, respectively, between the members 1, The member 56" at its center has an enlargement 60 which is axially apertured to receive and secure therewithin a bearing sleeve 61 through which the movable piston sleeve 40 is positioned. The enlargement 60 is molded about bearing sleeve 61.

' A yielding means, such as the coil spring 63, is operative against the annular bottom edge of a downwardly open socket 62 in enlargement 60 on member 50 and against the outwardly extending annular flange y43 of cap 41. The spring 63 may conveniently surround the sleeve 4t).

Referring now to FIGURES 3 and 4, I illustrate a vacuum pump wherein the valve plate 15 has been rotated degrees from the position in which it is illustrated in FIGURE 2, for example. It will be understoodthat cones 6, 7 are provided for attachment of suitable conduits, such ias flexible hoses and the like, an example.

thereof being illustrated at 6b, 7b in FIGURE 1. When the pump of the invention is employed as an air` pressure pump, the passages 6a, 7a are out-let passages positioned to deliver air to such conduits. The passages 8, 9' and 17, 18 are, accordingly, air 'inlet passages.V By rotating the valve plate 90 degrees, it will be observed that the segments 17a, 18a are seated in sockets 6c, 7c which .are Vactually enlargements. of.l passages 6a, 7a landfthat the passages 6a, 7a are converted to inlet passages and the passages 8, 9 are converted to exhaust passages.

Since many of the parts illustrated in FIGURES Zand 3 are identical with those'previously described, they have j been given identical numerals andfwill' not be: further described herein. In the vacuum pump version of the invention, the 4bolt 32 Vis secured t-o 'a fitting 70 which.

has, at its oppositeendfrom'bolt 32, a hexagonal outwardly extending fiange 71.` Secured, as indicated at 70a, to the fitting 7tl'is a iiexible, preferably bidirectionahshaft element 72.'- Secured to the opposite end of member 7 2k from fitting 70 is a fitting 73 toV which in turn is secured a circularV eccentric strap v74.v V,The strap 74has a cir-Y cumferential portion'75 for engagement with the perim` eter lof an eccentric operating element below described, andan annular end flange kportion 716.

An attachingsleeve 77' is'hollow for'reception of the member 72 with substantial circumferential space thereabout. An outwardly extending annular flange 78 is formed at one end of sleeve 77. A sleeve 79 vhas one of its ends seated uponthe upper'surface offlange 7S and its opposite end in contact with the under surface of member 34. Atv its end opposite-from the flange 78, the

sleeve 77 has an opening throughY which Vpasses the major Y elongated circumferentialportion,of the fitting 70'. vThe inner circumferential wall of' sleeve 77l lhas recesses,

grooves onnotches S1 formed to engage` the hexagonal surface of member 71 for the purposes described'below.v

Referring now rto FIGURE 1, Iillustrate a Ypowerl Y means such asv an electric motor 90 having an operating shaft (not shown) extending outwardly therefromv and ses ' through the passages V6a, 7a when the bellows is opened.

The employment of'plastic member 41 having a plastic end surface'42 andthe extended'flongitudinal sleeve bearing'61 are effective to prevent side motions of sleeve 40 and to provide a substantially noiseless operation of the air pressure pump of the invention. Y

When it isdesir'edthat the pump of the invention be operated as a vacuum pump, the valve plate 15 is`rotated 90 degreesto reversethe action'of the flapper valve elements 19,23, and the inlet and outlet passages in cover 1. and valve plate 15. In order to provide fora substantially noiseless operation of `the vacuum pump and for so'rne exing of thedrive shaft Velement thereof, I'provide a bi-directional flexible cable element 72. An eccentric strap 77,4V is circular in configuration and surrounds the ieccentric surface ofthe shaft of rmotor 90. To avoid twisting action ofY member 72 inassembling and' disassembling thevacuum jpump of the invention, I provide sleeve 77 having an operatingengagement with the. hexagonal fiange 71 of fitting170. The'outwardlyextending annular flange 7 8. may be lgrasped by any suitable tool to rotate the sleeve 77 and thus to rotateV the fitting 70 to secure the same to bolt 32 of member 30 and to sepa-rate the same.

By employmentof the mounting bracket member 93,-

with itscircurnfer'entially spaced, rearwardly directed sockets 94 in yassociation Vwith the laterally extending abutments 95l 'on ,the'pumpsf of the, invention, it will be observed'ltha't a plurality' oflsaidpumps may be driven by a single Aoperatingmeans. e, l y Whereas I have shown and described a preferred embodiment of my invention, it Will beunderstood that further modifications ywill suggestthemselves to those skilled in the'arty uponafreading of the, foregoing specification.

Accordingly, the foregoing'y description should'be taken as eratively engages the strap 74-when the vacuum pump',4

ing means. A mounting element 93fis secured to the housing of motor 90V and has Vformed therewithin a plurality of socket housings 94. Extending from the enlarge- The use and operation of my invention are as follows :l

Y I provide an air pressure pumpvof minimum WeightV and maximum simplicity in manufacture andV operation.y

' When the end surface 42 is moved by the cam or eccentricl surface on the 'shaft of motor 90, the sleeve 40' is moved in its bearing 61 toward the cover Ymember 1 againstxthe action of spring 63. Thus, the bellows 13 is compressed and anytair therewithinA is evacuated through passages.

21, 22 of valve plate member 175. The fiapper valve member 23 is raised by the passage. of suchV air and does not version of the invention is employed with the said 'operat-O merelyillustrative and not definitive,` and the scoperof theinvention should belimited only. by the vfollowing appended claims.V

I( claim:

1.v An air pressure pumpV comprising a cover plate,fan vinlet passage in said plate,.an 'outlet passage in said plate,

asvalve plate, an inlet passage inv said valve plate aligned with said inlet passage in said cover plate, an outlet pas-v 'V sagein said valve plate aligned with said outlet passage in said cover plate, a apper valve element secured to one.y

surface of said valve plate and overlying 'said inlet pas-r sage,V a second flapper valve element 'secured to the opposite surface of said'valve plate and overlying said out- Y letpassage'in said valve plate, abellows ,havingY one of Yitsends clamped between said cover'platek and said valve plate, a bottom Vplate,'an attaching plate, the'opposite end of said bellows A.being clamped between saidbott0m plate and said attachingV plate, a piston sleeve extending from I said bottom plate, a cap member at the outerend of said piston sleeve, means securing said attaching plate to said cap throughsaid piston, sleeve, a bearing'member sur- Y rounding said sleeveandme'ans securing said Vbearingvmemimpede the same. VThe dapper .valve 19 is held closed' l i by the airl pressure in bellows 13, t The air then is ydirected throughpasages 6a, 7afand cones 6, 7 into appropriate conduits such as those illustrated atb, 7b,;for-

delivery to a place Vof use. When the eccentric surface on the shaft .of motor 90 has turned its highv portionrbeyond the surface 42, the spring 6,3:v is effective to return the elements 30, 34, andjto lopen the bellows 13. Thus air drawn through inlet openings', 8, 9 in the coveri portionZx.v

and through passages 17, 18.in`va1ve plate 15, the fi'appen f valve 19 being movedY away from Vsaid passages 'byssuchl 5 entering air and the bellows is filled for a repeatedexpulfV Vsion of air, asabove described, theilapper valve 23 being held closed by the opening of kbellows 13;A 'It' will Vbe observed that theV apper valve element' V17,9 4.isi effective to prevent `outward movementtof airthrough passages 17, 18 when the bellows is compresseddhe flapper valve mem?` ber'23 -is eective'to prevent inward lmovement of air ber to said cover plate, yieldingmeans `operative between said bearing member and said cap element, to urge said bottom and attaching'pl'ates -away from said cover plate and toppen said bellows. .5 Y Y ai Y Y A 1.-.2. A vacuum-pump comprising a cover plate having an inlet passage and Van outlet passage, a valveplate having an inlet passage aligned With theinletrpassage. of said cover Vplate, nsaid valve plate having an outlet passage aligned' with said outlet passageofsaid cover plate, a flap- Vperfvalveelementsecured tofone surfacel of said vaive plate and overlying said'inlet passage in saidvalve plate,

. a, second flapper valve VVelement'secured to the opposite surface of'said valveplate and overlying said outletpas- I sagein said valve plate, aabellovvs lhaving one of its ends clampedbetween'saidpvalvex plate and said cover plate, a .bottom plate, a` clamping plate,- the opposite end of said bellowsbein'g compressed ,between` said', bottom plate and sa'id-V clamping:plate, a'Y fittingV :secured yto ,said clamping plate beyond said bttomplate, a flexible cable secured at one of its ends to said tting, an eccentric strap secured to the opposite end of said cable, a piston sleeve surrounding said cable in circumferentially spaced relationship therewith, a bearing member surrounding said sleeve, said bearing member being secured to said cover plate.

3. A pump including a cover member, inlet and outlet passages in said cover member, a plate secured to said cover member and having inlet and outlet passages aligned with corresponding passages in said cover member, valve elements associated with said inlet and outlet passages in said plate, a bellows having one of its ends clamped between said cover member and said plate, a piston, a bearing member for said piston, said bearing member being secured to said cover member in spaced relationship therewith, said piston being secured to the opposite end of said bellows within the space between said bearing member and said cover member, said piston having a portion extending outwardly from said bearing member in a direction away from said cover member.

4. The structure of claim 3 characterized by and including yielding means operative against said bearing member and said piston to urge said piston in a direction away from said cover member.

5. The structure of claim 3 characterized by and including a flexible element secured to said piston and an eccentric strap secured to said flexible member.

6. A pump comprising a cover, inlet and outlet passages in said cover, a plate secured to said cover, inlet and outlet passages in said plate, dapper valve elements on opposite sides of said plate and eifective to permit passage of Huid pressure in one direction only through each of said inlet and outlet passages, said inlet and outlet passages in said plate being selectively, alternatively alignable with said inlet and outlet passages in said cover and said outlet and inlet passages in said cover, a bellows having one of its ends clamped between said cover and said plate, a piston secured to tfhe opposite end of said bellows, a bearing member secured -tosaid cover and surrounding said piston beyond said bellows from said cover.

7. The structure of claim 6 wherein the inlet and outlet passages of said plate are aligned with the inlet and outlet passages of said cover and characterized by and including yielding means urging said piston in a direction away from said cover, and an eccentric abutment surface on said piston beyond said bearing member from said cover.

8. The structure of claim 6 wherein the inlet and outlet passages of said plate are aligned with the outlet and inlet passages f said cover and characterized by and including a flexible member secured to said piston and an eccentric strap secured to said flexible member beyond said bearing member from said cover.

9. A pump comprising a cover member, fluid pressure passages in said cover member, means on said cover member for attaching conduits for communication with said uid pressure passages, openings in said cover communicating with the atmosphere, a valve plate secured to said cover, inlet and outlet passages in said valve plate, valve elements positioned to control the passage of fluid pressure through said inlet and outlet passages in said valve plate, said valve plate inlet and outlet passages being selectively, alternatively alignable with said Huid pressure passages and said openings within said cover, a bellows having one of its ends secured to said valve plate, a piston secured to the opposite end of said bellows and a bearing member for said piston.

10. A pump comprising a cover, inlet and outlet passages in said cover, a plate secured to said cover, inlet and outlet passages in said plate, apper Valve elements on opposite sides of said plate and effective to permit passage of uid pressure in one direction only through each of said inlet and outlet passages, said inlet and outlet passages in said plate being selectively, alternatively alignable with said inlet and outlet passages in said cover and said outlet and inlet passages in said cover, a bellows having one of its ends secured to said plate, a piston member secured to the opposite end or said bellows, a bearing member for said piston member, said bearing member being secured to said cover at a point beyond said bellows from said cover.

References Cited by the Examiner UNITED STATES PATENTS 803,152 10/05 Cole 103-212 X 4,0 1,186,664 6/ 16 Kottusch 230-160 1,476,794 12/23 Berry 137-5123 X 1,639,623 8/27 White 103--152 X 1,696,013 12/28 Reid 230-187 2,372,302 3/45 Swindin 103--148 X ROBERT M. WALKER, Primary Examiner.

JOSEPH H. BRANSON, In., LAURENCE V. EFNER,

Examiners. 

1. AN AIR PRESSURE PUMP COMPRISING A COVER, PLATE, AN INLET PASSAGE IN SAID PLATE, AN OUTLET PASSAGE IN SAID PLATE, A VALVE PLATE, AN INLET PASSAGE IN SAID VALVE PLATE ALIGNED WITH SAID INLET PASSAGE IN SAID COVER PLATE, AN OUTLET PASSSAGE IN SAID VALVE PLATE ALIGNED WITH SAID OUTLET PASSAGE IN SAID COVER PLATE, A FLAPPER VALVE ELEMENT SECURED TO ONE SURFACE OF SAID VALVE PLATE AND OVERLYING SAID INLET PASSAGE, A SECOND FLAPPER VALVE ELEMENT SECURED TO THE OPPOSITE SURFACE OF SAID VALVE PLATE AND OVERLYING SAID OUTLET PASSAGE IN SAID VALVE PLATE, A BELLOWS HAVING ONE OF ITS ENDS CLAMPED BETWEEN SAID COVER PLATE AND SAID VALVE PLATE, BOTTOM PLATE, AN ATTACHING PLATE, THE OPPOSITE END OF SAID BELLOWS BEING CLAMPED BETWEEN SAID BOTTOM PLATE AND SAID ATTACHING PLATE, A PISTON SLEEVE EXTENDING FROM SAID B OTTOM PLATE, A CAP MEMBER AT THE OUTER END OF SAID PISTON SLEEVE, MEANS SECURING SAID ATTACHING PLATE TO SAID 